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March 13, 2003
Indicator
MARGIN LED Flashing
SYNC LED Off
ADC Telecommunications, Inc.
Probable Cause
• HDSL distance limit exceeded
• HDSL loop fault
• FRL-842 fault
• HDSL loop has lost synchronization
with the FRL-842
• HDSL distance limit exceeded
• HDSL loop fault
• FLL-812 fault
• FRL-842 fault
SCP-FLL812-011-01H
Solution
• From the Main Menu (Alarms
sub-menu), verify that no alarms exist
• Check engineering records for distance
between FLL-812 and RT
• From the Main Menu (Performance
sub-menu), verify HDSL loss status to
ensure maximum attenuation has not
been exceeded
• Replace FLL-812; then replace the
FRL-842
• Troubleshoot the outside plant
• From the Main Menu (Alarms
sub-menu), verify that no alarms exist
• Check engineering records for distance
between FLL-812 and FRL-842
• From the Main Menu (Performance
sub-menu), verify HDSL loss status to
ensure maximum attenuation has not
been exceeded
• Replace FLL-812; then replace the
FRL-842
• Troubleshoot the outside plant
137
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